EP1422008B1 - Elektrohandkreissägemaschine - Google Patents

Elektrohandkreissägemaschine Download PDF

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Publication number
EP1422008B1
EP1422008B1 EP03026679A EP03026679A EP1422008B1 EP 1422008 B1 EP1422008 B1 EP 1422008B1 EP 03026679 A EP03026679 A EP 03026679A EP 03026679 A EP03026679 A EP 03026679A EP 1422008 B1 EP1422008 B1 EP 1422008B1
Authority
EP
European Patent Office
Prior art keywords
handle
air
machine
motor
tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03026679A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1422008A1 (de
Inventor
Ulrich Bohne
Eugen Hild
Heiko Roehm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10305034A external-priority patent/DE10305034A1/de
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1422008A1 publication Critical patent/EP1422008A1/de
Application granted granted Critical
Publication of EP1422008B1 publication Critical patent/EP1422008B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/008—Cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B9/00—Portable power-driven circular saws for manual operation

Definitions

  • the invention relates to a Elektrohand Vietnamese spasägemachine, according to the preamble of claim 1.
  • the air required for the cooling of the electric motor is drawn in by a fan wheel seated non-rotatably on the output shaft of the electric motor via inlet slots in the machine housing and blown out again via outlet slots in the machine housing.
  • the fan blades of the fan impeller flow at the exit edges of the outlet slots at high speed, resulting in a strong noise in unpleasant high frequency range.
  • DE 40 03 029 is a hand tool machine with helical air duct for removing the engine exhaust air and through the US 4 414 743 a hand tool with over adjustable mechanisms rotatable handles without supplying engine exhaust known.
  • the electric hand-held circular saw according to the invention with the features of claim 1 has the advantage that on the one hand the air noise is attenuated by the discharge of the exhaust air leaving the electric motor on the one hand, in particular the unpleasant high frequency range On the other hand, the exhaust air is led away from the operator to the outside, so that it is not blown when working with the machine.
  • an air duct provided with an air inlet opening for the engine exhaust air is formed in the engine housing, which opens into the inlet of the bow handle.
  • the air duct helical or spiral formed with a to the inlet of the hollow auxiliary handle towards steadily increasing clear diameter.
  • the channel acts as a relaxation space, whereby a high amount of air can be transported at a reduced flow rate, which again significantly reduces the noise.
  • the helical formation is advantageous for the cases in which the direction of rotation of the electric motor and thus that of the motor fan is opposite to that of the tool.
  • the outlet is enclosed by an outlet, which is designed to be pivotable.
  • the outflow direction of the engine exhaust air can be adjusted so that it no unpleasant flows to the operator in any case of work.
  • the hollow auxiliary handle is designed as a bow handle which attaches in electric hand tool machines with a rotating tool at least partially covering the protective hood with its one end of the guard and at or near its other end of the handle on a receiving the electric motor housing part of the machine housing is, with its inlet is below the protective hood.
  • electric hand saw machine as an embodiment of a general electric hand tool for machining or grinding workpieces has a clam shell machine housing 10 with a molded handle 11 for guiding and handling the machine and an attached motor housing 12, in which an air-cooled Electric motor is added.
  • the electric motor drives a drive shaft 13 via a single-stage gearbox, which is not visible here, on which a circular saw blade 14 is firmly clamped.
  • the circular saw blade 14 is covered in the upper region by a protective hood 15, which is screwed onto the machine housing 10.
  • the protective cover 15 extends to a support plate 16 connected to the machine housing 10, with which the machine during the sawing operation on the Workpiece is placed.
  • the circular saw blade 14 protrudes through the support plate 16 and depending on the desired depth of cut over this more or less down before.
  • the support plate 16 is pivotable about a fixed in the direction of the circular saw blade 14 on the machine housing 10 pivot axis, wherein the selected pivot position is fixed by means of an adjustment.
  • a further adjusting device 17 arranged on the support plate 16 makes it possible to adjust the cutting angle of the machine by pivoting the support plate 16 about a pivot axis extending parallel to the saw blade plane.
  • an additional handle 21 which is designed as a bow handle and seen in the machine direction of the machine in front of the drive shaft 13 of the circular saw blade 14 near the front portion of the machine housing 10 is arranged.
  • the designated hereinafter as a bow handle 21 additional handle starts with a handle end on the guard 15, extends with a rotation axis of the circular saw blade 14 substantially parallel handle portion 211 above the platen 16 at a distance from this and is set with its other end of the handle on the motor housing 12.
  • the machine With the help of the bow handle 21, the machine can be placed very precisely plan on the workpiece and held very well when sawing both hands and guided, the large gripping area of the bow handle 21 ergonomic and safe handling of the machine in all cases both for legal and for Ensures left-handers.
  • the bow-shaped handle 21 is hollow and has an inlet 22 (FIGS. 3 and 4) which is open toward the interior of the protective hood 15 and an outlet 23 (FIGS. 1 and 2) arranged behind the handle area 211, which is preferably at or near that of FIG the handle 22 remote from the inlet end of the handle 21 is located.
  • the outlet 23 is enclosed by an outlet nozzle 24, which may advantageously be designed to be pivotable.
  • the motor housing 12 has air inlet slots 25 (FIG. 2), through which one rotates on the output shaft of the electric motor sitting fan 15 (not shown here) sucks in air.
  • the air flowing through the electric motor is blown out by the fan as heat-dissipating engine exhaust air and guided so that it flows into the inlet 22 of the hollow bow handle 21.
  • an air channel 26 is formed in the machine housing 10, which widens toward the inlet 22 of the bow-shaped handle 21 and opens into the inlet 22 (FIG. 3).
  • the air is blown by the fan from the interior of the electric motor into a hidden in Fig. 3 air inlet opening of the air channel 26.
  • the engine exhaust air flows, as symbolized by the arrow 27 in Fig. 3, through the air duct 26 and the hollow bow handle 21 and occurs at the outlet 23 enclosed by the outlet 23 in the bow handle 21 into the open.
  • the outlet port 24 is aligned so that the direction of discharge of the exhausting engine exhaust here points away from the operator of the machine. If the outlet port 24 is designed to be pivotable, the operator can individually adjust the air discharge direction that is appropriate for him or adapted to the case of work. Since, as mentioned above, between the electric motor and the drive shaft 13 of the circular saw blade 14, a single-stage transmission is arranged, the directions of rotation of the rotor of the electric motor and circular saw blade 14 are inversely or in opposite directions. The direction of rotation of the circular saw blade 14 is indicated in FIG. 4 by the arrow 28.
  • the air duct 26 is closed and run helically, as can be seen in part in Fig. 3, ie from its air inlet to the inlet 22 of the bow handle 21 as an axially expanding spiral, the clear diameter of the air channel 26 preferably increasing steadily.
  • the clam shell machine housing 10 is injection molded from plastic, wherein at least the handle 11, and the air duct 26 are formed with the same.
  • the bow handle 21 is designed as an insert, u.U. but also be molded with.
  • the spiral-shaped, 26 to the inlet 22 of the bow handle 21 expanding air duct 26 is integrally formed on both shells, which complement each other when assembling the shells to the air duct 26.
  • the invention is not limited to the described electric hand saw machine. It can be used on all hand-held power tools such as wall chasers, stone saws, angle grinders, cut-off grinders, concrete grinders, Orbital sander, belt sander, drill, hammer drill, hedge trimmer, embroidery saw, orbital sander, etc. ⁇ . Be used.
  • the hollow auxiliary handle is attached near the front end of the machine housing and the air duct from the motor housing to the inlet of the hollow auxiliary handle in the machine housing out accordingly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
EP03026679A 2002-11-22 2003-11-20 Elektrohandkreissägemaschine Expired - Lifetime EP1422008B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10254578 2002-11-22
DE10254578 2002-11-22
DE10305034 2003-02-07
DE10305034A DE10305034A1 (de) 2002-11-22 2003-02-07 Elektrohandwerkzeugmaschine

Publications (2)

Publication Number Publication Date
EP1422008A1 EP1422008A1 (de) 2004-05-26
EP1422008B1 true EP1422008B1 (de) 2008-01-30

Family

ID=32231884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03026679A Expired - Lifetime EP1422008B1 (de) 2002-11-22 2003-11-20 Elektrohandkreissägemaschine

Country Status (4)

Country Link
US (2) US20040192181A1 (zh)
EP (1) EP1422008B1 (zh)
CN (1) CN100446937C (zh)
DE (1) DE50309102D1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7526866B2 (en) * 2003-10-31 2009-05-05 Black & Decker Inc. Variable dust chute for circular saws
GB0723914D0 (en) * 2007-12-07 2008-01-23 Johnson Electric Sa A power tool
DE102008040017A1 (de) * 2008-06-30 2009-12-31 Hilti Aktiengesellschaft Handgeführte Kreissäge
US8747190B2 (en) * 2010-04-08 2014-06-10 Mark Smith Tool for removing grout, mortar and the like
DE102010041352A1 (de) * 2010-09-24 2012-03-29 Hilti Aktiengesellschaft Handgeführtes Elektrowerkzeuggerät mit einem Absaugadapter
JP5885557B2 (ja) * 2012-03-28 2016-03-15 リョービ株式会社 切断機
JP6380931B2 (ja) * 2014-09-12 2018-08-29 パナソニックＩｐマネジメント株式会社 電動丸鋸
CN107855593B (zh) * 2017-10-20 2023-04-11 向广宏 手持集尘切割机
US10875109B1 (en) 2018-04-30 2020-12-29 Kreg Enterprises, Inc. Adaptive cutting system
CN111300323B (zh) * 2020-03-18 2021-07-20 山东铭航机械科技有限公司 一种具有固定作用的电动扳手

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1749705A (en) * 1928-02-06 1930-03-04 Nathan S Lewin Abrading device
DE644011C (de) * 1935-03-30 1937-04-22 Carl Sauer Nutenfraesmaschine
US2418429A (en) * 1942-05-12 1947-04-01 Union Special Machine Co Sewing machine
US4281457A (en) * 1979-10-17 1981-08-04 Black & Decker Inc. Vacuum-operated cutting tool and system therefor
ATE18734T1 (de) * 1980-12-11 1986-04-15 Black & Decker Inc Kreissaege.
DE4003029A1 (de) * 1990-02-02 1991-08-08 Bosch Gmbh Robert Handgefuehrte werkzeugmaschine mit radialgeblaese
SE465960B (sv) * 1990-05-04 1991-11-25 Atlas Copco Tools Ab Vibrationsdaempad handhaallen rotationsslipmaskin
US5595532A (en) * 1995-10-20 1997-01-21 Waxing Corporation Of America, Inc. Electrically-powered polisher
DE69929404T2 (de) * 1998-08-13 2006-08-31 Black & Decker Inc., Newark Batteriebetriebene tragbare Kreissäge mit Schnittiefeneinstellvorrichtung
DE19924552A1 (de) * 1999-05-28 2000-11-30 Hilti Ag Elektrisch betreibbares Handgerät
US6447387B1 (en) * 2001-02-13 2002-09-10 Ming-Qun Tseng Exhaust assembly for a pneumatic sanding device
DE20203683U1 (de) * 2002-03-08 2003-07-24 Bosch Gmbh Robert Handhobelmaschine

Also Published As

Publication number Publication date
CN100446937C (zh) 2008-12-31
DE50309102D1 (de) 2008-03-20
US20060141914A1 (en) 2006-06-29
EP1422008A1 (de) 2004-05-26
US7207874B2 (en) 2007-04-24
CN1506195A (zh) 2004-06-23
US20040192181A1 (en) 2004-09-30

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